Electric vehicle batteries are proving significantly more durable than commonly believed, with a new study revealing most retain over 90% of their capacity after three years, effectively dispelling a major consumer concern.
The analysis, conducted by U.S.-based consulting firm Recurrent, specializes in electric vehicle performance. It compiled telematic data from thousands of electric vehicles to compare their real-world range at purchase with performance after three years of use.
The study concluded that battery degradation, while present, is far less significant than often thought. In some models, there was no evident capacity degradation.
Several brands showcased impressive battery retention. Ford vehicles, for example, maintained 99.9% of their original capacity, followed by Nissan at 98.4% and Audi at 96.8%.
Tesla models retained 96.3% of their initial capacity, while Kia vehicles held 96.2%. Even those manufacturers experiencing the most degradation, such as Jaguar, BMW, and Volkswagen, still preserved over 90% of original battery capacity.
This surprising durability in certain models might be attributed to a strategic approach by manufacturers. Liz Najman, Recurrent’s Director of Market Research, suggested that some vehicles incorporate internal battery buffers.
These buffers represent a small amount of capacity inaccessible to the driver. As the battery naturally degrades over time, manufacturers can gradually release portions of this hidden margin. This prevents users from perceiving a significant drop in range.
Software updates also contribute to extended battery life. These updates can optimize various functions, including regenerative braking, climate control systems, heat pumps, and overall vehicle efficiency.
Usage patterns remain a critical factor. Battery degradation can vary based on total mileage, whether driving is predominantly in urban or highway environments, and the type of terrain.
The study also highlighted that older electric vehicle models, such as the 2014 BMW i3 or 2018 Jaguar I-Pace, typically exhibited greater capacity loss. This contrasts with newer vehicles, which often integrate larger batteries, more efficient cooling systems, and advanced thermal management.
Earlier generations of electric vehicles were not as optimized. Therefore, concerns regarding battery degradation held more weight in the past. Current data indicates that this issue is now practically residual, having a very limited impact.
These findings are crucial for bolstering consumer confidence. The demonstrated stable battery performance, characterized by minimal and predictable losses, helps alleviate apprehension about investing in an electric vehicle.
Increased transparency from manufacturers, coupled with comprehensive studies, is bringing clarity to the debate on battery durability. This trend suggests an even more promising future for electric mobility.